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    Methods and systems for reducing waiting-time jitter
    1.
    发明授权
    Methods and systems for reducing waiting-time jitter 失效
    减少等待时间抖动的方法和系统

    公开(公告)号：US07599400B2

    公开(公告)日：2009-10-06

    申请号：US11218430

    申请日：2005-09-06

    申请人： Kim B. Roberts ,  Chandra Bontu ,  James Harley

    发明人： Kim B. Roberts ,  Chandra Bontu ,  James Harley

    IPC分类号： H04J3/06

    CPC分类号： H04J3/076 ,  H04L1/205

    摘要： A method of minimizing jitter in a system for rate adapting a data signal for transport through a synchronous network. A phase difference is measured between a data clock synchronous with the data signal and a local clock of the synchronous network. A timing reference (F) indicative of a frequency difference between the asynchronous data signal and the local clock is measured using the measured phase difference. Calculation of the timing reference includes compensating ambiguity in the measured phase difference.

    摘要翻译： 一种使系统中的抖动最小化的方法，用于速率调整用于通过同步网络传输的数据信号。 在与数据信号同步的数据时钟与同步网络的本地时钟之间测量相位差。 使用测量的相位差来测量指示异步数据信号和本地时钟之间的频率差的定时参考（F）。 定时参考的计算包括补偿测量相位差的模糊度。

    Signal acquisition in a coherent optical receiver
    2.
    发明授权
    Signal acquisition in a coherent optical receiver 有权
    相干光接收机中的信号采集

    公开(公告)号：US07636525B1

    公开(公告)日：2009-12-22

    申请号：US11423822

    申请日：2006-06-13

    申请人： Chandra Bontu ,  Kim B. Roberts ,  Han Sun ,  Edgar Velez ,  Kuang Tsan Wu

    发明人： Chandra Bontu ,  Kim B. Roberts ,  Han Sun ,  Edgar Velez ,  Kuang Tsan Wu

    IPC分类号： H04B10/06

    CPC分类号： H04L7/0075 ,  H04B10/60 ,  H04B10/61 ,  H04B10/6162 ,  H04B10/6165 ,  H04L7/0004

    摘要： A method and system for initializing a coherent optical receiver. Upon detection of an optical signal, a multi-bit digital sample stream of the optical signal is digitally processed to initialize each one of a plurality of adaptive control blocks of the coherent optical receiver. The adaptive control blocks include at least a dispersion compensation block and a clock recovery block. The dispersion compensation block is initialized before initializing the clock recovery block.

    摘要翻译： 一种用于初始化相干光接收机的方法和系统。 在检测到光信号时，数字地处理光信号的多比特数字样本流，以初始化相干光接收机的多个自适应控制块中的每一个。 自适应控制块至少包括色散补偿块和时钟恢复块。 在初始化时钟恢复块之前初始化色散补偿块。

    Sample timing control in an optical receiver
    4.
    发明授权
    Sample timing control in an optical receiver 有权
    光接收机中的采样定时控制

    公开(公告)号：US07894728B1

    公开(公告)日：2011-02-22

    申请号：US11550042

    申请日：2006-10-17

    申请人： Han Sun ,  Chandra Bontu ,  Kim B. Roberts ,  John Sitch ,  John Wolczanski

    发明人： Han Sun ,  Chandra Bontu ,  Kim B. Roberts ,  John Sitch ,  John Wolczanski

    IPC分类号： H04B10/06

    CPC分类号： H04L7/0075 ,  H04B10/60 ,  H04B10/61 ,  H04B10/6162 ,  H04B10/6165 ,  H04L7/0004

    摘要： A method of compensating phase error between parallel digital signals of a received optical signal, in a coherent optical receiver. A phase differential between the digital signals is determined. A digital skew is imposed between the digital signals, an amount of skew imposed being an integer number of sample periods calculated to most nearly compensate the phase differential. The skewed digital signals are then digitally processed, in the frequency domain, to compensate a residual portion of the phase differential.

    摘要翻译： 在相干光接收机中补偿接收光信号的并行数字信号之间的相位误差的方法。 确定数字信号之间的相位差。 在数字信号之间施加数字偏移，施加的倾斜量是被计算为最接近地补偿相位差的整数个采样周期。 然后在频域中数字地处理偏斜的数字信号，以补偿相位差的剩余部分。

    High-speed digital signal processing in a coherent optical receiver
    5.
    发明授权
    High-speed digital signal processing in a coherent optical receiver 有权
    相干光接收机中的高速数字信号处理

    公开(公告)号：US07769305B1

    公开(公告)日：2010-08-03

    申请号：US11533940

    申请日：2006-09-21

    申请人： Kim B. Roberts ,  Han Sun ,  Chandra Bontu ,  Kuang Tsan Wu

    发明人： Kim B. Roberts ,  Han Sun ,  Chandra Bontu ,  Kuang Tsan Wu

    IPC分类号： H04B10/00

    CPC分类号： H04L7/0075 ,  H04B10/60 ,  H04B10/61 ,  H04B10/6162 ,  H04B10/6165 ,  H04L7/0004

    摘要： In a coherent optical receiver, a frequency domain engine digitally processes at least two multi-bit sample streams of a received optical signal. The frequency domain engine includes a Fast Fourier Transform (FFT) filter for computing a complex vector representative of a frequency-domain spectrum of the received optical signal. A transpose and add block computes a vector sum of the complex vector and a transposed version of the complex vector, and an Inverse Fast Fourier Transform (IFFT) filter computes a complex output vector from the addition result. With this arrangement, parallel real filter operations are efficiently performed on each of the multi-bit sample streams, using a single back-to-back FFT-IFFT filter structure.

    摘要翻译： 在相干光接收机中，频域引擎对接收到的光信号的至少两个多比特采样数字进行数字处理。 频域引擎包括用于计算表示所接收的光信号的频域频谱的复矢量的快速傅里叶变换（FFT）滤波器。 转置和加法块计算复矢量的矢量和和复矢量的转置版本，而快速傅里叶逆变换（IFFT）滤波器根据相加结果计算复数输出矢量。 利用这种布置，使用单个背靠背FFT-IFFT滤波器结构，对每个多比特采样流有效地执行并行实际滤波器操作。

    Non-linear equalizer in a coherent optical receiver
    6.
    发明授权
    Non-linear equalizer in a coherent optical receiver 有权
    相干光接收机中的非线性均衡器

    公开(公告)号：US07684712B1

    公开(公告)日：2010-03-23

    申请号：US11551367

    申请日：2006-10-20

    申请人： Kim B. Roberts ,  Chandra Bontu ,  Kuang Tsan Wu ,  Han Sun

    发明人： Kim B. Roberts ,  Chandra Bontu ,  Kuang Tsan Wu ,  Han Sun

    IPC分类号： H04B10/06 ,  H04L27/06

    CPC分类号： H04L7/0075 ,  H04B10/60 ,  H04B10/61 ,  H04B10/6162 ,  H04B10/6165 ,  H04L7/0004

    摘要： A method of recovering a most likely value of each symbol transmitted through an optical communications network using a high speed optical signal. A stream of multi-bit digital samples of the optical signal is processed to generate a respective multi-bit estimate X′(n) of each transmitted symbol. A first function is applied to each symbol estimate X′(n) to generate a corresponding soft decision value {tilde over (X)}(n). Each soft decision value {tilde over (X)}(n) is processed to generate a corresponding hard decision value. {circumflex over (X)}(n) having an ideal amplitude and phase. A plurality of successive soft decision values and hard decision values are processed to determine a second function, which is applied to each soft decision value {tilde over (X)}(n) to generate a most likely symbol value {circumflex over ({circumflex over (X)}(n).

    摘要翻译： 一种利用高速光信号恢复通过光通信网传输的每个符号的最可能值的方法。 对光信号的多比特数字样本流进行处理以产生每个发送符号的相应的多比特估计X'（n）。 将第一函数应用于每个符号估计X'（n）以产生相应的软判决值{（X）}（n）上的波浪号。 处理每个软决策值（对（X）}（n）的波形）以产生相应的硬判决值。 （X）}（n）具有理想的振幅和相位。 处理多个连续的软判决值和硬判决值以确定第二函数，其被应用于每个软判决值（（X）}（n）上的波形）以产生最可能的符号值{回旋（{circumflex （X）}（n）。

    Efficient data transmission and training of data processing functions
    10.
    发明授权
    Efficient data transmission and training of data processing functions 失效
    高效的数据传输和数据处理功能的培训

    公开(公告)号：US07522841B2

    公开(公告)日：2009-04-21

    申请号：US11328199

    申请日：2006-01-10

    申请人： Chandra Bontu ,  Kuang Tsan Wu ,  John McNicol ,  Kim B. Roberts ,  Han Sun

    发明人： Chandra Bontu ,  Kuang Tsan Wu ,  John McNicol ,  Kim B. Roberts ,  Han Sun

    IPC分类号： H04B10/00

    CPC分类号： H04J3/0608 ,  H04J14/06 ,  H04L7/027 ,  H04L7/0278 ,  H04L7/048

    摘要： A method of a conveying data through an optical communications system. An optical signal is received through the optical communication system, the optical signal comprising data symbols and SYNC bursts, each SYNC burst having a predetermined symbol sequence. The received optical signal is oversampled to generate a multi-bit sample stream. The sample stream is partitioned into blocks of contiguous samples, wherein each block of samples partially overlaps at least one other block of samples and encompasses at least one SYNC burst and a plurality of data symbols. Each block of samples is independently processed to detect a value of each data symbol.

    摘要翻译： 一种通过光通信系统传送数据的方法。 通过光通信系统接收光信号，光信号包括数据符号和SYNC脉冲串，每个SYNC脉冲串具有预定的符号序列。 所接收的光信号被过采样以产生多比特采样流。 样本流被划分为连续样本块，其中每个样本块与至少一个其他样本块部分重叠，并且包含至少一个SYNC突发和多个数据符号。 每个样本块被独立地处理以检测每个数据符号的值。